Physics
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jatp...44..529o&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 44, June 1982, p. 529-537.
Physics
8
Antarctic Regions, Auroral Echoes, Electric Fields, Propagation Velocity, Radar Tracking, Scatter Propagation, Annual Variations, Backscattering, Doppler Effect, Electron Mobility, Radar Echoes, Radial Velocity, Very High Frequencies
Scientific paper
A dual coherent 50 MHz auroral radar installed at Siple Station, Antarctica, continuously monitored echo intensity and mean-Doppler velocity from December 29, 1976, until late March 1978. The experimental technique is described here, and some statistical results are presented, including yearly averaged echo-occurrence patterns and irregularity drift velocity characteristics. The results show that: (1) the irregularity drifts are approximately westward (poleward electric fields) in the evening, and eastward (equatorward electric fields) in the morning following the electric field reversal in the region of the Harang discontinuity; (2) the Harang discontinuity under disturbed conditions as seen by both radars is located around 2100-2300 MLT; (3) the relationship between the irregularity drift velocity and the actual electron drift velocity is strongly dependent on the angle between the radar beam and the earth's magnetic field, as predicted by linear theory.
Balsley Ben B.
Carter D. A.
Ecklund Warner L.
Johnston Paul E.
Ogawa Takuro
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